Hypertropic cardiomyopathy (HCM) is a condition associated with thickening of the heart muscles. HCM is responsible for sudden death in preadolescent, adolescent and is mostly asymptomatic. Severity of HCM varies from person to person. HCM is a genetic condition caused by a change or mutation in one or more genes that encode for the sarcomere proteins such as myocin heavy chain, actin and topomyosin. HCM is passed on through family showing autosomal dominant inheritance with variable penetration, therefore there is 50% risk of inheritance in children. Mutations in the myosin-binding protein (MYBPC3) gene are one of the most frequent genetic causes of hypertrophic cardiomyopathy. Individuals with family history of sudden cardiac arrest, severe chest pain, breathing difficulty, elevated blood pressure during excercise are at high risk of having HCM. Genetic testing for MYBPC3 mutation gives the information regarding predictive risk for HCM which helps in better clinical diagnosis of situation.